Salts CaSO4 4.0g, CaCl 1.8g, MgSO4, 0.8g plus a quarter tab of campden. Will add 25g of BioHaze in 500-800mL H2O at Dry Hop.
Based on boiling 7.25 gallonsliters at 1.048 for 30 minutes, this will decrease your wort by 0.50 gallonsliters, bringing your after boil OG to 1.051. You wanted an OG of 1.058. It looks like it will be under.